A: Demonstrate to the class: place a few drops of vanilla extract into a balloon (careful not to drip on outside of balloon) knot balloon closed and place into the empty box (prove the box is empty and doesn't smell). Set aside and work on something else. At end of class, open the box and smell (heavy odor of vanilla). Have the class examine and explain.

Instruct the students to close their eyes and raise their hand the moment they smell an odor. Spray perfume or open ammonia in front of the room; record time and number of students that raise their hand. Discuss what was happening and why. Try other areas and odors in room. Place a fresh paper bag of popcorn in the room and notice how many students say they smell it.

B: Opt. (Have a glass pie pan filled with water on an overhead and place drops of food coloring into water and observe.) Each student needs a cup of hot and a cup of cold water along with food coloring. Instruct them to place one drop into the cold water and time it until it is uniformly colored and do the same for hot water. Do worksheet and discuss results. Chart results on chalkboard.

C: Have students in groups with 4-6 members. Each group has rice in a Ziploc bag and some newspaper. Cover the floor or desk that they will be working over. One student will stick their hand in the liquid starch and then in the bag of rice. With the rice covered, hand shake hands with each remaining member. They can record data and compare with other groups. First child will have most rice and the last child to shake hands with the rice person will have the least. (another way) Similar to a chain link, the rice person will shake hands with one person and that person shakes hands with the next one in line until everyone has given a hand shake.

D: Have students in groups with 4-6 members. Each group needs salt, corn syrup, water, dialysis tubing and two cups. A salt water solution and the corn syrup are placed in their own dialysis tubing and then placed in each cup. Fill each cup almost full with water. Let it sit and check it daily for results. Students should see that water is moving from the clear water into the tubing which has either salt water or corn syrup. Record and discuss.

Performance Assessment:

I would expect that all the students would be able to successfully completeand perform the experiments.I would assess their learning from: observation, discussion, participationand completion of work sheets.

WORKSHEETS
A: Do you think the vanilla will escape?_________________
How will it escape?_________________________________________________
Did the vanilla escape?____________
Give an explanation for the results.________________________________
____________________________________________________________________
B: What will happen when the coloring enters the water?________________
____________________________________________________________________
Will the two cups get the same results?_____________________________
If not, why?________________________________________________________
Basis for your reasoning.___________________________________________
____________________________________________________________________
start time for cold:____________ end time for cold:_________________
start time for hot:_____________ end time for hot:__________________
Based on your results what was happening and why did it turn out that
way?________________________________________________________________
____________________________________________________________________
C: What is going to happen to the rice when you shake hands?___________
Will there be a difference between the first and last, why?_________
____________________________________________________________________
Where and how did the rice travel during the experiment?____________
____________________________________________________________________
Explain.____________________________________________________________
Results amount of rice on hand amount of rice dropped FIRST PERSON ______________________ ______________________ SECOND PERSON ______________________ ______________________ THIRD PERSON ______________________ ______________________ FOURTH PERSON ______________________ ______________________D: What happened inside the dialysis tube with corn syrup?____________________ What happened inside the dialysis tube with salt water?____________________ What happened inside both of the cups?_____________________________________ Explanation:_______________________________________________________________

Conclusions:

Students will find out that particles disperse themselves through diffusion and osmosis. Students will find out that particle movement is affected by movement, temperature and concentration. The movement of particles from greatest concentration to lowest concentration is diffusion. Osmosis is the movement of water through a semi-permeable membrane.